Senior Unsecured Notes and Secured Debt (Tables)

3 Months Ended

Jun. 30, 2012

Senior Unsecured Notes And Secured Debt (Tables) [Abstract]

Principal payments due on debt obligations

	Senior		Secured
	Unsecured Notes(1,2)		Debt (1,3)		Totals
2012	$	244,939(4)	$	19,610	$	264,549
2013		300,000		220,373		520,373
2014		0		201,317		201,317
2015		250,000		214,550		464,550
2016		700,000		301,528		1,001,528
Thereafter		3,444,403		1,328,065		4,772,468
Totals	$	4,939,342	$	2,285,443	$	7,224,785
(1) Amounts represent principal amounts due and do not include unamortized premiums/discounts or other fair value adjustments as reflected on the balance sheet.
(2) Annual interest rates range from 3.0% to 8.0%.
(3) Annual interest rates range from 1.2% to 8.0%. Carrying value of the properties securing the debt totaled $4,095,959,000 at June 30, 2012.
(4) We provided notice of redemption to the holders of $168,086,000 of convertible senior unsecured notes in June 2012. See Note 19 for additional information.

Summary of senior unsecured note issuances

	Six Months Ended
	June 30, 2012			June 30, 2011
			Weighted Avg.			Weighted Avg.
	Amount		Interest Rate	Amount		Interest Rate
Beginning balance	$	4,464,927	5.133%	$	3,064,930	5.129%
Debt issued		600,000	4.125%		1,400,000	5.143%
Debt redeemed		(125,585)	4.750%		-	0.000%
Ending balance	$	4,939,342	5.021%	$	4,464,930	5.133%

Secured debt principal activity

	Six Months Ended
		June 30, 2012		June 30, 2011
			Weighted Avg.			Weighted Avg.
	Amount		Interest Rate	Amount		Interest Rate
Beginning balance	$	2,108,373	5.34%	$	1,133,715	5.59%
Debt issued		139,395	4.43%		58,470	5.78%
Debt assumed		284,988	5.68%		689,888	5.39%
Debt extinguished		(229,207)	4.22%		-	0.00%
Principal payments		(18,106)	5.55%		(12,944)	6.00%
Ending balance	$	2,285,443	5.45%	$	1,869,129	5.52%